If source_pid or dest_pid < 0, kill will kill all procs owned by user running the test.  Added check for that case.
If source_pid or dest_pid < 0, kill will kill all procs owned by
user running the test.  Added check for that case.

globus/globus-toolkit,ellert/globus-toolkit,globus/globus-toolkit,gridcf/gct,gridcf/gct,globus/globus-toolkit,gridcf/gct,globus/globus-toolkit,gridcf/gct,globus/globus-toolkit,ellert/globus-toolkit,ellert/globus-toolkit,ellert/globus-toolkit,gridcf/gct,gridcf/gct,ellert/globus-toolkit,globus/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,globus/globus-toolkit,ellert/globus-toolkit,ellert/globus-toolkit